{"id":20138,"date":"2025-08-17T14:31:29","date_gmt":"2025-08-17T12:31:29","guid":{"rendered":"https:\/\/thesmartcityjournal.cibeles.net\/sin-categoria\/researchers-uncover-surprising-limit-on-human-imagination\/"},"modified":"2025-08-17T14:34:27","modified_gmt":"2025-08-17T12:34:27","slug":"researchers-uncover-surprising-limit-on-human-imagination","status":"publish","type":"post","link":"https:\/\/www.thesmartcityjournal.com\/en\/studies\/researchers-uncover-surprising-limit-on-human-imagination","title":{"rendered":"Researchers uncover surprising limit on human imagination"},"content":{"rendered":"<p><i><span style=\"font-weight: 400\">Humans can track a handful of objects visually, but their imaginations can only handle one<\/span><\/i><\/p>\n<p><span style=\"font-weight: 400\">Human beings can juggle up to 10 balls at once. But how many can they move through the air with their imaginations?<\/span><\/p>\n<p><span style=\"font-weight: 400\">The answer, published last month in Nature Communications, astonished even the researchers pursuing the question. The cognitive psychologists found people could easily imagine the trajectory of a single ball after it disappeared. But the imagination couldn\u2019t simultaneously keep tabs on two moving balls that fell from view.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u201cWe set out to test the capacity limits of the imagination, and we found that it was one,\u201d said co-author Tomer D. Ullman, associate professor in the Department of Psychology. \u201cI found this surprising, so I can understand if others do, too.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400\">Ullman, who heads Harvard\u2019s Computation, Cognition, and Development lab, has a long-time interest in what is known as intuitive physics. Think of the brain conjuring a ball as it rolls downhill, or sounding the alarm over two objects on a sure-fire collision course.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u201cHow do we interact with the physical world around us?\u201d wondered Ullman, who is also affiliated with the Kempner Institute for the Study of Natural and Artificial Intelligence. \u201cI subscribe to the theory that the brain may be running mental simulations, kind of like a video game.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400\">These couldn\u2019t be perfect simulations of physical environments, right down to the level of atoms and molecules. So Ullman\u2019s lab has worked to understand what kinds of hacks and workarounds make mental simulations possible.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u201cThe human imagination is just really cool, and we find a lot of people are quite interested in how it works,\u201d he offered.<\/span><\/p>\n<p><span style=\"font-weight: 400\">A sizable body of research has explored the capacity limits of human perception, or how many objects the brain can track in a visual scene. \u201cMaybe you\u2019re a parent watching multiple kids, or maybe you\u2019re a lifeguard on duty,\u201d Ullman said. \u201cObviously you can\u2019t keep track of everything.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400\">Neuroscientists, psychologists, and computational modelers have found visual tracking is limited to just a handful of moving objects. But few have explored the imagination\u2019s capacity limits.<\/span><\/p>\n<p><span style=\"font-weight: 400\">In the new study, online participants were shown an animation of a bouncing ball, as if on a racquetball court, before it vanished. Others saw two balls ricocheting at completely different cadences before both disappeared. Designing the experiments with Ullman was lead author Halely Balaban, an assistant professor of cognitive psychology at the Open University of Israel.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Also devised were two computational models to explain how the imagination might follow these invisible balls to their moment of impact. The first model posited that multiple objects would be moved in parallel, while the second envisioned independently moving each ball in more of a serial fashion.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Ullman and Balaban found their online recruits were pretty good at predicting when a single invisible ball would have hit the ground. But people fumbled at tracking two.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u201cIt was harder than any of us expected,\u201d said Ullman, noting how reliably the exercise produced laughs.<\/span><\/p>\n<p><span style=\"font-weight: 400\">Based on past findings, the co-authors originally thought the imagination could probably track about three or four objects. There were also intuitive reasons to think the mind\u2019s eye could move multiple objects in parallel.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u201cIf I close my eyes right now, I can see a tower of blocks falling down,\u201d Ullman noted. \u201cIt doesn\u2019t feel limited. People feel like they should be able to move more than one.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400\">In fact, a follow-up experiment found people were slightly better at tracking two balls that moved in tandem before disappearing. But performances still paled next to a yet another follow-up, in which study participants tracked two balls that remained visible until impact.<\/span><\/p>\n<p><span style=\"font-weight: 400\">When it comes to tracking objects that have disappeared, the researchers found, the human imagination relies largely on a serial model, moving each piece one after the other.<\/span><\/p>\n<p><span style=\"font-weight: 400\">A separate follow-up tested whether people might be conserving mental energy by employing a serial model. After all, running a simulation via the parallel model would require more effort. Imagine a computer running multiple simulations at once.<\/span><\/p>\n<p><span style=\"font-weight: 400\">\u201cWe offered participants a bunch of money if they could get this right,\u201d Ullman explained. \u201cBut that didn\u2019t seem to matter.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400\">For Ullman, the findings open an exciting frontier. \u201cThere has been decades and decades of work on how the mind uses clever tricks to keep track of what\u2019s in front of you,\u201d he said. \u201cBut there\u2019s been so little on the tricks and limitations of the mind\u2019s eye. I could imagine a lot more work to do here.\u201d<\/span><\/p>\n<p><span style=\"font-weight: 400\">Text: Christy DeSmith (Harvard Staff Writer)<\/span><\/p>\n<p><span style=\"font-weight: 400\">Image: Tomer D. Ullman.Niles Singer\/Harvard Staff Photographer)<\/span><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Humans can track a handful of objects visually, but their imaginations can only handle one Human beings can juggle up to 10 balls at once. But how many can they move through the air with their imaginations? The answer, published last month in Nature Communications, astonished even the researchers pursuing the question. The cognitive psychologists\u2026<\/p>\n","protected":false},"author":2,"featured_media":20137,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_scj_primary_category_id":132,"_scj_featured":false,"_scj_featured_from":"","_scj_featured_until":"","_scj_featured_order":0,"_scj_visibility_class":"current","_scj_layout_family":"study","_scj_article_style":"","_scj_display_overrides":[],"_scj_intro_image_id":20137,"_scj_intro_alt":"Researchers uncover surprising limit on human imagination","_scj_intro_caption":"","_scj_intro_class":"","_scj_intro_float":"","_scj_full_image_id":20137,"_scj_full_alt":"Researchers uncover surprising limit on human imagination","_scj_full_caption":"","_scj_full_class":"","_scj_full_float":"","_scj_media_type":"","_scj_media_provider":"","_scj_media_external_id":"","_scj_media_url":"","_scj_media_poster_id":0,"_scj_media_width":0,"_scj_media_height":0,"_scj_media_aspect_ratio":"","_scj_media_description":"","_scj_gallery_items":[],"_scj_related_post_ids":[],"_scj_additional_authors":[],"scj_layout_family":"study","scj_media_provider":"","scj_media_url":"","scj_full_caption":"","footnotes":""},"categories":[132],"tags":[2110,2322,2527],"class_list":["post-20138","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-studies","tag-brain-health","tag-cognitive-psychology","tag-cognitive-science"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.4 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Researchers uncover surprising limit on human imagination - thesmartcityjournal.com<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.thesmartcityjournal.com\/en\/studies\/researchers-uncover-surprising-limit-on-human-imagination\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Researchers uncover surprising limit on human imagination - thesmartcityjournal.com\" \/>\n<meta property=\"og:description\" content=\"Humans can track a handful of objects visually, but their imaginations can only handle one Human beings can juggle up to 10 balls at once. 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